Spring barrel construction



Dec. 8, 1931. R T, AX 1,835,258

SPRING BARREL CONSTRUCTION Filed July 29. 1925 I N V EN TOR.

A TTORNEYS ROY r. AXE, or SYRACUSE, new Yonnnssrenoa r THE 0.

Patented Dec. 8, 1931 UNITED S ATES II\T 0., orsyneou'sn, NEW YonK, A oonironar'ron'oi" NEWYORK j i srnme nananr, CONSTRUCTION Application ,filed July 29,

' such as are used forf counterbalancing cur a so tains,- window. sashes and the like particularly those used in railroad ears where it is impractical to use'window weights,- and has for its object a spring roller which is particularly simple, compact and economical in construction and highly efficient and durable muse. t t a 7' The invention consists in the novel features and in the combinations and constructions hereinafter setferth and claimed; v In describing this invention reference is had to the accompanying drawings in which like characters desi nate corresponding parts in all the views; v V

Figure 1 is a longitudinal sectionalview ofja spring roller embodying my invention. Figure 2 is an end elevation of parts seen in Fig.'1.-

Figurei; 1s a fragmentary sectional view of p i 7 ing the shaft Send the springiheld under tension until the roller can be..mounted in supporting brackets by sliding the barrel axially of; the shaft to engage the raek 15 a roller embodying another form of my invention. V

This spring roller comprises generally a barrel, a shaft on which the barrel is mounted, a torsion spring anchored at one end to the shaft and at its other end to the barrel, the barrel being shiftable axiallyof the shaft the spring counterbalancing the curtain or sash supported by the roller, the barrel and the shaft being provided with coacting means forholding the barrel from being actuated by the spring, the portion of said means on the barrel being movable into and out of engagement with the portion on the shaft by the axialmovement of the barrel.

1 designates the barrel of the roller, the roller being here shown as having heads 2, 3 at opposite ends of the barrel, the heads being inserted in the ends of the barrel and secured in position in any suitable manner as by screws 4. V

5 desi nates the shaftextending axially of the barrel, the barrel being mounted on the shaft to rotate about the shaft. 7

6 is the torsion spring located in the barrel 1 and encircling the shaft. 5, the spring 6 being anchored at one end to the shaft 5 and at its other end to the barrel or to one of the heads 2, 3. The spring 6 is here illustrated After the spring barrel 1925. Serial No. 46,773.

ATENT M. nnwnnns ooMra'NY,

as anchored at one end at 7 tola spring abut- I ment 8 mounted on and fixed to the shaft 5, and at its other end at '9 to the head 2.

Both abutment 8 and thehead 2 are formed with hubs 11' and 12'about which the end coils of the spring extend. Theshaft extends beyond theends of the barrel, the end 13 thereof constituting one of the'airles for the roller and the end 1 1, the other aide. The

end 13 is fiattenedto fit into a suitable brackst for holding the shaft from turning move-v ment inthe normal :operation of the roller; The barrel 1. is shiftable axially; slightly and isformed with an annular ratcheting surface or rack 15 at one end for .coacting witha tooth or pawl 16 on the shaft 5. A Asseen in Figs. land 2, this rack 15 is provided on outer end face .of the head 2 and the tooth or pawl 16 is a pinextending transversely through the shaft 5 or-the end 13-. p i

The spring is initiallytensionedby turnrack face 15 is sufficientto hold the barrel against being shifted endwise by the spring 6 and thus disengage the tooth or pawl 16 from the rack face.

has been mounted in the brackets and iconnected to the curtain or window sash to counterbalance it the barrel is shifted endwise to disengage thegrack 15 from the tooth or pawl Inoperation the spring 6 holds the barrel shifted to the right so that rack 15 is away: from the tooth .or pawl. This shifting to theright is limited by athrust washer to be described later. The rack 15 and the tooth or pin 16 have no shown as awasher 17 thrusting against the function except Whenthe-barrel is being nounted or dismounted in its supporting brackets. Before removing the barrel from its mounting it is first shifted endwisetog end of the hub 12 of the head 2, and against a shoulder 18 as a transverse pin on the shaft 5. The washer has a shoulder 19 engaging the shoulder 18 on the shaft to hold the washer from undue turning movement relatively to the shaft and cause the normal bearing surface to come between the washer l7 and the head 12.

In Fig. 3, the shaft 50 is shown as terminating within the barrel 100 and the head 140 of the barrel provided with an axle 150 fixed thereto. By this construction, the spring and, shaft with the head 2 or spring abutment therein can be made of standard length and adapted to barrels of various lengths.

Vhat I claim is:

1. A counterbalance for sashes including in combination a barrel having a head at one end; a shaft rotatively mounted in the barrel and extending through the head and axially shiftable with respect to the barrel; a coiled spring located in the barrel and anchored at one end to the head and at its other end to the shaft, so as to urge the shaft to shift axially with respect to the barrel, and to wind up when the barrel is turned with respect to the shaft; means on the barrel and shaft shiftable into engagement when the shaft is shifted axially, against the pressure of the spring to lock the shaft and barrel against relative rotation.

2. A counterbalance for sashes including in combination a barrel having a head at one end; a shaft rotatively mounted in the barrel and extending through the head and axially shiftable with respect to the barrel; a coiled spring located in the barrel and anchored at one end to the head and at its other end to the shaft, so as to urge the shaft to shift axially with respect to the barrel, and to wind up when the barrel is turned with respect to the shaft; means limiting the travel of said shaft in an axial direction under urge of the spring, means on the barrel and shaft shiftable into engagement when the shaft is shifted axially, against the pressure of the spring, to lock the shaft and barrel againt relative rotation.

3. A counterbalance for sashes including in combination a barrel having a head at one end; a shaft rotatively mounted in the barrel and extending through the head and axially shiftable with respect to the barrel; a coiled spring located in the barrel and anchored at one end to the head and at its other end to the shaft, so as to urge the shaft to shift axially with respect to the barrel, and to wind up when the barrel is turned with respect to the shaft; a thrust bearing member on the shaft having a bearing surface engageable with the head for limiting the travel of said shaft in an axial direction under urge of the spring, means on the barrel. and shaft shiftable into engagement when the shaft is shifted axially, against the pressure of the spring, to lock the shaft and barrel against relative rotation.

i. A counterbalance for sashes including in combination a barrel having a head at one end; a shaft rotatively mounted in the barrel and extending through the head and axially shiftable with respect to the barrel; a coiled spring located in the barrel and anchored at one end to the head and at its other end to the shaft, so as to urge the shaft to shift axially with respect to the barrel, and to Wind up when the barrel is turned with respect to the shaft; rack means secured to the barrel; rack engaging means connected to the shaft and shiftable into engagement with said rack means of the barrel when the shaft is shifted relative to the barrel against the urge of the spring, to lock the shaft and barrel against relative rotation.

5. A counterbalance for sashes including in combinati on a shaft; a barrel mounted on the shaft; a spring located within the barrel; one part of the spring being attached to the shaft and another part to the barrel so that said sprin will wind up when the barrel and shaft are turned with respect to one another, means shiftable into engagement to lock the barrel and shaft against relative rotation, said locking means being normally held out of engagement by the splin In testimony whereof, I have hereunto signed my name, at Syracuse, in the county of Onondaga, and State of New York, this 19th day of June, 1925.

ROY T. AXE. 

